milliken



(No Model.)

1 W. H. MILLIKEN;

Hydraulic Elevator.

No. 243,391. Patent-ed June 28, |881.l

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UNITED STATES PATENT OFFICE.

WILLIAM H. MILLIKEN, OF SAN FRANCISCO, CALIFORNIA, ASSIGNOR OF ONE-HALF TO FREDERICK N. WOOD, OF SAME PLACE.

HYDRAULIC ELEvAToR.

SPECIFICATION forming part of Letters Patent No. 243,391, dated June 28, 1881. Application led August 13,1880. (No model.)

To all whom tt may concern:

Be it known that I,W`1LL1AM H.M1LLIKEN, of the city and county of San Francisco, State of California, have invented a n ew and useful the following is a specication.

My invention relates to that class of hydraulic elevators which have a plunger-fastvention consists in certain improvements in' the water-cylinder, and its adaptation to the purpose of forming alining for the well, and to be in itself the tube used in boring or sinking the well.

Referring to the accompanying drawings, forming apart of this specification, Figure l rep- 2 5 resents a sectional elevation of my improved cylinder and plunger in two broken lengths, and sealing-plug. Fig. 2 is a plan of sealingplug. Fig. 3 is a plan of piston. Fig. .tshows a sectional view of my improved manner of connecting the plunger-head to under side of platform or cage, to accommodate any cauting of the cage which may occur.

Like letters of reference refer to like parts in all the iigures ofthe drawings.

To make my invention clearly understood l will state that heretofore in elevators of the class named the working-cylinder has generally been placed in a well already formed, either in the hard rock, requiring no lining' or in a brick-lined well, or in a well lined with the ordinary Artesianwell tubing used in sinking the well. Now, with my improvement I propose to avoid the expense of making any lining for the well other than is formed by my working-cylinder itself, which may be made of the ordinary deep-well tubin g used by Artesianwell borers.

In the drawings, A is the working-cylinder, formed of the wrought-iron tubing named. It 5o should be of the best quality and sufficiently thick to admit of the joint at a being of proper k fective. Improvement in Hydraulic Elevators, ofwhich v strength, forksince4 the joint must not project inside or out beyond the remainder of the tube, if the tube be too thin this joint would be de'- lhis workin g-cylinder may consist of 5 5 many lengths, according to the depth of the well, and is open at the bottom during the process of sinking it.

Bis a plug of cast-iron,formed of two disks, b b', capable of vbeing drawn together' by the 6o central bolt, b, in such a manner as to squeeze out a packing, C, against the sides of the tube, which packing is inserted previous to the plug being placed in position. The bolt b" will be screwed up or loosened with a socket-wrench attached to any suitable tools Aof the well-borer. The top of this working-cylinder, after it is sunkinto its final resting-place, is mounted with a suitable stuffing-box, I), having a gland,

E, the said stuffing-box being screwed onto the 7o end of the workingcylinder, or in any other suitable way secured tightly thereon.

The ingress and egress opening F for the water is formed just below the stuffing-box on the same casting, a pipe being screwed into the opening, upon which pipethe usual supply and exhaust cock is attached.`

Gr is the plunger, a stout metallic tube, preferably of wrought-iron, smooth on the outside as far as it passes through the stuffing-box, 8o and terminating on the bottom with what I call a cataract7 piston, H, which piston is screwed onto the end in the manner shown in Fig. l. This plunger G may be in as many pieces as convenient, the joints being made by means of the internal coupling, I, so as to leave the outside of the plunger perfectly smooth.

llycataract-piston H is simplya cap screwed onto the lower end of theplunger, having an 9o exterior diameter equal to theinterior diameter of the working-cylinder, so that it may form a guide to maintain the true perpendicular position of the plunger; but this piston does not completely obstruct the passage of the water, for it has grooves J cut upon its periphery, taking by the combined areas of their cross-v section an area equal to about one-half of the total area of the inletopening F, so that when the Water is admitted to the cylinder it may roo nd a passage-way to the under side of the piston, so as to give a pressure thereupon to raise the plunger and its superimposed load, and also to permit the egress of the water from underneath the piston when the exhaust-cock is opened for the purpose of allowing the plunger to fall, the iall being obtained with a gentle motion, not capable of being accelerated beyond the limit allowed by the area of the passage the grooves in the piston provide, thus making a most complete automatic safety device which, not having any liability to get out of order, would be especially desirable in elevators carrying passengers. These grooves J may be found to be too large or too small after the elevator has run an extended period, either on account of their becoming choked by corrosion or impurities in the water, or by reason of the piston having become worn 5 but whatever occurs to change their condition must necessarilybe so gradual and slow of progress that ample opportunity will be given to apply the remedy which will naturally be suggested.

The cap of the plunger K, which is secured just below the floor of the cage, (the cage not being shown in the drawings,) may be simply a. flat round disk screwed onto the plunger, as in Fig. l, and fastened to the cage by screwbolts, or it may be a ballandsocket joint, as in Fig. 4, which latter construction will permit the canting of the cage without causing any side strain upon the plunger, which might, in some cases, be disadvantageous, as tending to increase friction and otherwise interfere with the smooth action of the machine. This arrangement shown in Fig. 4 may be thus described:

L is a collar with convex faces, top and bottom, screwed on end of plunger. M is a wrought-iron plate fastened under the timbers ofthe cage, made concave to fit the collar L; and N is an annular plate, also concave, as shown, to fit under side of collar, and when bolted to the plate M contines the collar and secures the cage to the plunger, as clearly shown in the figure.

lf preferred, and found suitable, the sealingplug B may be dispensed with and a simple seal of hydraulic cement poured into the cylinder when set in its final position.

The operation of the supply and exhaust cock is not materially dierent from what is now practiced, and I need not enter into any description with reference to it.

The plunger G, being made of wrought-iron tube in the manner described, may be so light and yet sufficiently strong that the cumbersome and dangerous counter-balance usually applied in this class of elevators may be dis pen sed with and although a slightlyincreased quantity of water will necessarily be expended in operating, in consequence of the imperfect balance resulting, still it is thought that so many advantages as to safety and convenience arise from the counter-balance bein gvdispen sed with that it will be found desirable to submit to the additional expense of the water, rather than incur the inconvenience and risk when the counter-balance is employed.

What I claim as my invention, and desire to secure by Letters Patent, is as follows:

l. In a hydraulic elevator, the combination of the open-bottom well-lining A, through which the well is bored, plug B, placed after well is bored, and stuffing-box D,having gland E, the whole forming a working-cylinder, substantially as and for the purpose herein described.

2. In a hydraulic elevator, the adjustable joint connecting the head ot' the plunger Gr with the cage, consisting of the collar L and plates M and Nfastened together, as a means of accommodating the canting of the cage, as and for the purpose herein described.

WILLIAM H. MILLIKEN.

Witnesses:

GEORGE PARDY, WM. R. BAILEY. 

